22 Feb
2015
22 Feb
'15
4:45 p.m.
On the same subject, I'm guessing that when DCP-o-matic resamples audio
it is performing a simple resampling and not a time-stretching
algorithm, and so the pitch of the audio will change.
This is normally fine, but in some cases e.g. with music videos it can
be undesirable.
There are various pieces of software that have a time-stretching
function (inc. the open source Audacity). Does anyone have a
recommendation for the best program to use for this, which produces
minimum audio distortion?
And am I right in assuming that DCP-o-matic doesn't do this anyway?
Many thanks,
Jim
On 22/02/2015 15:44, Carsten Kurz wrote:
Am 22.02.2015 um 16:36 schrieb Kevin Orman:
Hi Carl,
Re: Sound Sync.
I'm using 1.76 which I've just realised is not the latest.. in the timing tab I
changed frame rate from 25 to 24 and I believe DCP-o-Matic used to say, audio re-sampled
to xxx, but it does not now so I must be changing the wrong value.
Any ideas? Thanks, Kevin.
Hi Keith,
the timing tab is the wrong place to adjust the DCP frame rate in order to create a 24fps
DCP with proper audio resampling from a 25fps source.
You have to leave all fields the way they are there and select the intended frame rate
under the DCP tab. That will instruct DCP-o-matic to apply the proper resampling to the
audio.
So in this case, leave it at 25fps under Timing, and set to 24 fps in the DCP tab. You
will then see the comment on audio resampling applied under the content->audio tab.
We had a similiar issue just a few days ago on the list or on the forum. Maybe we need
some clarification for the frame rate field in the timing tab. It only designates source
frame rate reference and should only be changed manually when there is a wrong reference
on the source file.
- Carsten
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